1      Subroutines are programming tools used within "programs".  While
 2 "commands" are invoked from "command level," subroutines are invoked from
 3 within programs.  If you have occasion to use subroutines, you can get
 4 descriptions of them by using the help command.  Just type the name of the
 5 subroutine with the help command.  For example:
 6 
 7 help menu_
 8 
 9 To get a particular entry point in a subroutine, type the name of that
10 specific entry point with the help command.  For example, by typing
11 
12 help menu_$display
13 
14 you automatically bypass the 4 menu_ entry points described in alphabetical
15 order before this one.
16 
17      You can practice getting help with subroutines right now by pressing the
18 function key F2.  That will put you at command level, where you can use the
19 help command to find out about some of the subroutines you may want to know
20 about, such as menu_.